How to use appsettings.json in Asp.net core 6 Program.cs file-CodePudding

I'm trying to access appsettings.json in my Asp.net core v6 application Program.cs file, but in this version of .Net the Startup class and Program class are merged together and the using and another statements are simplified and removed from Program.cs. In this situation, How to access IConfiguration or how to use dependency injection for example ?

Edited : Here is my default Program.cs that Asp.net 6 created for me

var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
builder.Services.AddControllers();
builder.Services.AddStackExchangeRedisCache(options =>
{
    options.Configuration = "localhost:6379";
});

builder.Services.AddSwaggerGen(c =>
{
    c.SwaggerDoc("v1", new() { Title = "BasketAPI", Version = "v1" });
});
var app = builder.Build();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger/v1/swagger.json", "BasketAPI v1"));
}
app.UseHttpsRedirection();
app.UseAuthorization();
app.MapControllers();
app.Run();

For example , I want to use appsettings.json instead of hard typed connectionstring in this line :

options.Configuration = "localhost:6379";

CodePudding user response：

Assuming an appsettings.json

{
    "RedisCacheOptions" : {
        "Configuration": "localhost:6379"
    }
}

There is nothing stopping you from building a configuration object to extract the desired settings.

IConfiguration configuration = new ConfigurationBuilder()
                            .AddJsonFile("appsettings.json")
                            .Build();

var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
builder.Services.AddControllers();
builder.Services.AddStackExchangeRedisCache(options => {
    options.Configuration = configuration["RedisCacheOptions:Configuration"];
});

//...

CodePudding user response：

appsettings.json is included by default, you can use it directly. If you want to include files explicitly, you can include them like this

builder.Configuration.AddJsonFile("errorcodes.json", false, true);

And dependency injection like this

builder.Services.AddDbContext<>() // like you would in older .net core projects.